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// SPDX-License-Identifier: GPL-2.0
/*
* This file is based on code from OCTEON SDK by Cavium Networks.
*
* Copyright (c) 2003-2007 Cavium Networks
*/
#include <linux/kernel.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <linux/ratelimit.h>
#include <linux/of_mdio.h>
#include <generated/utsrelease.h>
#include <net/dst.h>
#include <asm/octeon/octeon.h>
#include "ethernet-defines.h"
#include "octeon-ethernet.h"
#include "ethernet-mdio.h"
#include "ethernet-util.h"
#include <asm/octeon/cvmx-gmxx-defs.h>
#include <asm/octeon/cvmx-smix-defs.h>
static void cvm_oct_get_drvinfo(struct net_device *dev,
struct ethtool_drvinfo *info)
{
strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
strlcpy(info->version, UTS_RELEASE, sizeof(info->version));
strlcpy(info->bus_info, "Builtin", sizeof(info->bus_info));
}
static int cvm_oct_nway_reset(struct net_device *dev)
{
if (!capable(CAP_NET_ADMIN))
return -EPERM;
if (dev->phydev)
return phy_start_aneg(dev->phydev);
return -EINVAL;
}
const struct ethtool_ops cvm_oct_ethtool_ops = {
.get_drvinfo = cvm_oct_get_drvinfo,
.nway_reset = cvm_oct_nway_reset,
.get_link = ethtool_op_get_link,
.get_link_ksettings = phy_ethtool_get_link_ksettings,
.set_link_ksettings = phy_ethtool_set_link_ksettings,
};
/**
* cvm_oct_ioctl - IOCTL support for PHY control
* @dev: Device to change
* @rq: the request
* @cmd: the command
*
* Returns Zero on success
*/
int cvm_oct_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
if (!netif_running(dev))
return -EINVAL;
if (!dev->phydev)
return -EINVAL;
return phy_mii_ioctl(dev->phydev, rq, cmd);
}
void cvm_oct_note_carrier(struct octeon_ethernet *priv,
cvmx_helper_link_info_t li)
{
if (li.s.link_up) {
pr_notice_ratelimited("%s: %u Mbps %s duplex, port %d, queue %d\n",
netdev_name(priv->netdev), li.s.speed,
(li.s.full_duplex) ? "Full" : "Half",
priv->port, priv->queue);
} else {
pr_notice_ratelimited("%s: Link down\n",
netdev_name(priv->netdev));
}
}
void cvm_oct_adjust_link(struct net_device *dev)
{
struct octeon_ethernet *priv = netdev_priv(dev);
cvmx_helper_link_info_t link_info;
link_info.u64 = 0;
link_info.s.link_up = dev->phydev->link ? 1 : 0;
link_info.s.full_duplex = dev->phydev->duplex ? 1 : 0;
link_info.s.speed = dev->phydev->speed;
priv->link_info = link_info.u64;
/*
* The polling task need to know about link status changes.
*/
if (priv->poll)
priv->poll(dev);
if (priv->last_link != dev->phydev->link) {
priv->last_link = dev->phydev->link;
cvmx_helper_link_set(priv->port, link_info);
cvm_oct_note_carrier(priv, link_info);
}
}
int cvm_oct_common_stop(struct net_device *dev)
{
struct octeon_ethernet *priv = netdev_priv(dev);
int interface = INTERFACE(priv->port);
cvmx_helper_link_info_t link_info;
union cvmx_gmxx_prtx_cfg gmx_cfg;
int index = INDEX(priv->port);
gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
gmx_cfg.s.en = 0;
cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
priv->poll = NULL;
if (dev->phydev)
phy_disconnect(dev->phydev);
if (priv->last_link) {
link_info.u64 = 0;
priv->last_link = 0;
cvmx_helper_link_set(priv->port, link_info);
cvm_oct_note_carrier(priv, link_info);
}
return 0;
}
/**
* cvm_oct_phy_setup_device - setup the PHY
*
* @dev: Device to setup
*
* Returns Zero on success, negative on failure
*/
int cvm_oct_phy_setup_device(struct net_device *dev)
{
struct octeon_ethernet *priv = netdev_priv(dev);
struct device_node *phy_node;
struct phy_device *phydev = NULL;
if (!priv->of_node)
goto no_phy;
phy_node = of_parse_phandle(priv->of_node, "phy-handle", 0);
if (!phy_node && of_phy_is_fixed_link(priv->of_node)) {
int rc;
rc = of_phy_register_fixed_link(priv->of_node);
if (rc)
return rc;
phy_node = of_node_get(priv->of_node);
}
if (!phy_node)
goto no_phy;
phydev = of_phy_connect(dev, phy_node, cvm_oct_adjust_link, 0,
PHY_INTERFACE_MODE_GMII);
of_node_put(phy_node);
if (!phydev)
return -ENODEV;
priv->last_link = 0;
phy_start_aneg(phydev);
return 0;
no_phy:
/* If there is no phy, assume a direct MAC connection and that
* the link is up.
*/
netif_carrier_on(dev);
return 0;
}
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